Jack Zou contributed to the rh-writers/BUT-technical-writing-course-2025 repository by developing comprehensive documentation and establishing foundational project scaffolding. He authored the Eggs Cooking Guide Documentation in Markdown, providing clear, step-by-step instructions to enhance user guidance and onboarding for new contributors. Jack also created the initial project structure within the vim-co-delam-project directory, laying the groundwork for scalable, documentation-driven development. His work demonstrated effective use of Git for version control and technical writing skills to maintain clarity and organization. No major bugs were addressed during this period, reflecting a stable codebase and allowing focus on expanding and refining documentation assets.